Re-encoding video to WebM?

[donmccurdy]

One of my more common tasks with ffmpeg is converting a video to webm for smaller size on the web. Would you be open to reviewing a PR adding this command to the app, if I wrote one up? Thanks!

[megapro17]

it will be very slow and not effective

[zeh]

Would you be open to reviewing a PR adding this command to the app, if I wrote one up? Thanks!

Of course! FFmpegwasm seems to be compiled with libvpx and libvorbis support, so this means webm should be supported.

You can edit /src/utils/commands/commands.json and open a PR against the dev branch (default). That should be all that's needed to create new commands. I assume WebM encoding would be a new command, with whatever parameters and selectors you deem necessary.

I'll document the JSON's syntax and contribution workflow better in the future, but feel free to play around with it already if you have time and interest.

BTW, we already have a "Re-encode video as H.264" command in our list, but it uses some H.264 specific parameters. So I would recommend against trying to add a codec selector to make this a generic "Re-encode video as H.264 or WebM". Maybe we can do that in the future when we have more complex selector combinations/checkboxes/etc, but not yet.